Webster's Online Dictionary
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Definition: ELECTRO-MAGNETIC

Part of Speech Definition
Adjective 1. Of, Pertaining to, or produced by, magnetism which is developed by the passage of an electric current.[Websters].

Source: Webster's Revised Unabridged Dictionary (1913)

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Date "Electro-magnetic" was first used in popular English literature: sometime before 1821. (references)

Specialty Definition: ELECTRO-MAGNETIC

Domain Definition
Noah Webster [Adjective] Designating what pertains to magnetism, as connected with electricity, or affected by it. Electromagnetic phenomena. Source: Webster's 1828 American Dictionary.

Source: compiled by the editor from various references; see credits.

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Common Expressions: ELECTRO-MAGNETIC

Expressions Definition
Electro-magnetic engine An engine in which the motive force is electro-magnetism. Source: Webster's Revised Unabridged Dictionary.
Electro-magnetic induction The influence by which an electric current produces magnetic polarity in certain bodies near or around which it passes. Source: Webster's Revised Unabridged Dictionary.
Electro-magnetic telegraph A telegraph in which an operator at one station causes words or signs to be made at another by means of a current of electricity, generated by a battery and transmitted over an intervening wire. Source: Webster's Revised Unabridged Dictionary.
Electro-magnetic theory of light (Physics), a theory of light which makes it consist in the rapid alternation of transient electric currents moving transversely to the direction of the ray. Source: Webster's Revised Unabridged Dictionary.

Source: compiled by the editor from various references; see credits.

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Specialty Expressions: ELECTRO-MAGNETIC

Expressions Domain Definition
Electro-Magnetic Interference Electrical Engineering Interference caused by electrical fields due to capacitive coupling, or magnetic fields due to mutual inductance, or electromagnetic fields (radio waves). Source: European Union. (references)

Source: compiled by the editor from various references; see credits.

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Topics by Level of Interest: ELECTRO-MAGNETIC

Topics sorted by level of Interest Level (1=low, 600=high)     Topics sorted Alphabetically Level (1=low, 600=high)
The Psycho-Social, Chemical, Biological & Electro-Magnetic Manipulation of Human Consciousness 12     The Psycho-Social, Chemical, Biological & Electro-Magnetic Manipulation of Human Consciousness 12

Source: the editor, created by/for EVE to gauge likely levels of human interest in linguistically triggered topics (compiled across various sources, such as Wikipedia and specialty expression glosses).